- Structural probing of ketone catalysts for asymmetric epoxidation
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A series of chiral ketones derived from carbohydrates were investigated as catalysts for the asymmetric epoxidation. Fructose-derived ketones are found to be efficient catalysts. The studies show that the structural requirements for the ketone catalysts are very stringent and different types of olefins may require ketones with different structural arrangements. The current study allows us to further understand the chiral ketone catalyzed asymmetric epoxidation and provides some insight for the development of new catalysts.
- Tu, Yong,Wang, Zhi-Xian,Frohn, Michael,He, Mingqi,Yu, Hongwu,Tang, Yong,Shi, Yian
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p. 8475 - 8485
(2007/10/03)
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- Preparation and catalytic hydrogenolysis of some ω-halogenoalkyl β-D-fructopyranosides; a convenient route to simple alkyl β-D-fructopyranosides
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The acid-catalysed reactions of D-fructose, sucrose and inulin with ω-halogenoalkyl alcohols yield the corresponding β-D-fructopyranosides.Catalytic hydrogenolysis of these glycosides provides a simple route to some crystalline alkyl β-D-fructopyranosides of potential biological interest.
- Raaijmakers, Harry W. C.,Eveleens, Susan M.,Arnouts, Esther G.,Zwanenburg, Binne,Chittenden, Gordon J. F.
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p. 511 - 514
(2007/10/02)
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- The Preparation and Reactions of a New Glycoside: 2'-Chloroethyl β-D-Fructopyranoside
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Reaction of D-fructose with 2-chloroethanol containing hydrogen chloride at room temperature afforded highly crystalline 2'-chloroethyl β-D-fructopyranoside (4) in >90percent yield.The chloro substituent has been substituted by various nucleophilic anions
- Chan, Jonathan Y. C.,Cheong, Pauline P. L.,Hough, Leslie,Richardson, Anthony C.
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p. 1447 - 1456
(2007/10/02)
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- Chiral Syntheses of (R)-Spirobi-1,4-dioxan and Related Compounds from D-Fructose
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Syntheses of (R)-1,4,7,10-tetraoxaspiroundecane (spirobi-1,4-dioxan), (R)-1,4,7-trioxa-10-thiaspiroundecane, and (R)-1,4,7-trioxa-10-azaspiroundecane from 2'-chloroethyl β-D-fructopyranoside are reported, in which the chirality of the spiro-ring junction is defined by the configuration of the anomeric carbon atom of the glycoside.
- Chan, Jonathan Y. C.,Hough, Leslie,Richardson, Anthony C.
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p. 1151 - 1153
(2007/10/02)
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